Islam spread considerably under the leadership of abu bakr and the success of muslim armies. true or false

True.

Explanation:

The given statement is true.

Abu Bakr was a friend and father-in-law of Prophet Muhammad. To maintain the union of the Islamic State, Abu Bakr apportioned his Muslim army to make the Arabian tribes into servility. Following a series of victorious campaigns, Khalid ibn Walid, the general of Abu Bakr overcame a competing prophet and the Arabian peninsula was assembled under the caliphate in Medina. When the resistance had been quieted, Abu Bakr launched a war of conquest. And within a short period, his campaigns led to the emergence of one of the largest empires of the world.

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.